The Walgreen Company (NYSE: WAG), d/b/a Walgreens (without an apostrophe), is a pharmacy chain, mail service, and pharmacy benefit manager, with specialty pharmacy operations in all 50 states, the District of Columbia and Puerto Rico. The company also operates worksite health centers, home care facilities and institutional pharmacies, giving them a total of 7,123 locations as of November 30, 2008.Walgreens is one of the three largest drug store chains in the United States. Walgreens states that it serves 5 million customers per day. It also filled 583 million prescriptions in fiscal 2007.Walgreens had 6,659 drugstores as of Jan. 31, 2009.Walgreens was founded in Chicago, Illinois, in 1901 and has since expanded throughout the United States. Its headquarters is located in Deerfield, Illinois.
